text: The Principle of the SNIF-NMR is built on: “The Natural Isotopic Fractionation”. Routinely for food authenticity, two nuclei are used:
  * The Hydrogen nuclei: H-SNIF-NMR method was the initial application of SNIF-NMR, it measures the ratio of deuterium/hydrogen on each site of a sample molecule
  * The Carbon nuclei: C-SNIF-NMR method has opened new possibilities of analysis by SNIF-NMR (new molecules and new applications). This method will use the ratios of C over C on each site of a molecule